Remove front torsion bar, go 2-2 on the camber and toe, try hard axle, 2 seat struts on each side, and 54″ at rear track, move the seat about 2″ to 3″ forward and lean it back about 8.5 to 9.5″ from lip to axle.
I am not an expert, but with my fat ass, and my hight this seems the only thing that works for me.
I hope this helps, or at least give you a good starting point, and if he doesn’t like it, then you can put it back where it was and try something else.
And after that if he doesn’t like it, tell him “life is not for everyone” No, I’m just kidding, sorry. Lol